JPS59107777A - Welding device of thin sheet member - Google Patents

Abstract

PURPOSE:To improve the durability of jigs and welding quality by setting the width of a back bar formed of a metal having high heat conductivity at the width between both upper jigs or below and punching cooling water passages of which the one side wall is formed of the back bar in a receiving jig. CONSTITUTION:When a welding torch 19 of an automatic welding machine positioned above a work joint part W3 is scanned along the part W3 while cooling water is run in cooling water passages 11, 12, both work halves W1, W2 are joined to one body and a product is obtd. Since the width B of a bar 10 is set at the width (b) between both upper jigs 4 and 4 or below, the pressing force of the jigs 4, 4 is fully borne by a receiving jig 3 and is not applied on the bar 10. The bar 10 is therefore kept free from deformation and wear and is not adversely influenced by the spatter that may be stuck between the jigs 3 and 4. Since the bar 10 is directly cooled by the cooling water with good efficiency, the welding conditions are maintained constant and the good result of welding is obtd.

Description

[Detailed description of the invention] The present invention relates to an improvement in a welding device for thin plate members.

In the molding of fuel tanks and the like for motorcycles, welding work has been carried out using a welding device as shown in FIG. That is, the joint W3' of the curved works W1' and W2' is connected to the back bar 10 made of a metal with high thermal conductivity such as copper.
' is placed on the receiving jig 3' which is formed by embedding the puncture bar 10' and cooling water passages 11' and 12' are bored on the left and right sides of the puncture bar 10'. ', 4
' to clamp the workpiece joint W3', and then the automatic welding machine 1
At 9', the joint W3' was joined by welding.

However, according to the above device, since the cooling water passages 11' and 12' bored in the receiving jig 3' are spaced apart from the back bar 10', the back bar 10' cannot be cooled sufficiently. Therefore, there was a problem that uniform welding results could not be obtained. Also, as shown in FIG. 5, the back bar 10'
Because the back bar 10' is wide, the upper jig 4', 4
There is a problem of deformation due to the pressure of ', and this deformation is particularly severe when dirt, ivy, etc. adheres between the receiving jig 3' and the upper jig 4', 4'.

The present invention has been made to effectively eliminate such inconveniences, and its purpose is to provide a welding device for thin plate members that has excellent jig durability and can improve welding quality. It is in.

In order to achieve such an object, the present invention sets the width of the back par embedded in the receiving jig under the width plate between the upper jig divided into two on the left and right, and also sets the back par embedded in the receiving jig. The gist of this is that a cooling water passage was bored into one side wall.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a cutaway side view of the main parts of the entire welding device according to the present invention;
2 is a sectional view taken along the line 2-2 in FIG. 1, FIG. 3 is an enlarged view of the second fixing section, and FIG. 4 is a partially cutaway view of the same device.

In Fig. 1, reference numeral 1 denotes a machine base supported by a stem 2.-, and on the machine base 1, a receiving jig 3 having a desired shape and a surface 3a is fixedly set. A work W to be welded is placed on the jig 3.

This workpiece W is, for example, a fuel tank of a motorcycle, etc., and is made of a press-formed thin steel plate or the like.
, which should be joined by butting W2 comrades together,
The joint W3 is set so as to be positioned on the receiving jig 3.

The workpiece W is placed inside the workpiece W as shown in FIG. 2, divided into left and right parts along the joint W3 of the workpiece W, and is held under pressure by upper jigs 4, 4. Both rows are supported by support arms 5.5. The above-mentioned rain jigs 4, 4 are supported by a par 9 which is movably supported via a cylinder unit 6, a par 7, and a rod 8, which are fixed to the lower surface of the machine base 1.

As shown in FIGS. 2 to 4, in the center of the receiving jig 3, there is a packer 10 formed into a flat plate from a metal with high thermal conductivity such as copper, which extends the entire height and length of the receiving jig 3. The pack par 109 width B is above the rain/8.
The width is set to be less than or equal to the width between the tools 4, 4 (B≦b). Also, the packer 10 is placed on both sides of the banker 10 in the receiving jig 3.
A cooling water passage 11, 12 with a rectangular cross section, which is in contact with the banker 10, is bored in the longitudinal direction,
Both passages 1L12 communicate with each other via a hole 10a formed in the packer 10, as shown in FIG. Also both aisles 1
1.12 and both passages 11. of pack par 10 and receiving jig 3.
The upper groove 13.13 and each passage 11.1 are sealed by sealing members 15.15 and 16.16 that fit into the grooves 13.13 and 14.14 bored on the upper and lower sides of the upper groove 12.
2 and are communicated with each other through small ffs 411a and 12a.

Both passages 11.12 are connected to a water supply device such as a cooling water pump (not shown) via pipes 17.18.

Thus, the welding torch 19 of the automatic welding machine located above the workpiece joint W3 while flowing cooling water into the cooling water passages 11 and 12.
If is scanned along the workpiece joining part W3, the two workpieces w, , 'w2 are joined together and a product such as a fuel tank is obtained.

In the above, the width B of the pack par 10 is
Since the width is set to be less than the width between the two, all of the pressing force of the rain jig 4.4 is supported by the receiving jig 3, and is not applied to the packer 10. As a result, the packer 10 was deformed by the pressing force of the rain top jig 4.4 as in the past, but it did not wear out, and spatter etc. adhered between the receiving jig 3 and the top jig 4, 4. However, the durability of the packer 10 is significantly improved without being adversely affected by these factors. Furthermore, since the packer 10fl'i is buried over the entire height of the receiving jig 3, even if the upper surface of the packer is worn out, it can be dealt with by moving it upward.

Also, the pack par 10 connects the cooling water passages 11 and 12 to each passage 11.
．． 12, the packer 10 is directly and efficiently cooled by the cooling water flowing through these passages 11 and 12. As a result, the welding conditions remain constant9.
In this way, good welding results can be obtained and welding quality can be improved. Furthermore, the upper seal groove 13.13 is connected to the small grooves 11a and 12.
Since the sealing members 15.15 that fit into these sealing grooves 13.13 can also be cooled with cooling water, these sealing members 15.1
It is possible to effectively prevent durability deterioration due to heat as described in No. 5.

The sealing member 1 located below the cooling water passage 11.12
6.16, so there is no need to consider these forced coolings.

As is clear from the above description, according to the present invention, in a welding device that holds a workpiece under pressure between a receiving jig and an upper jig divided into left and right halves and welds the workpiece, The width of the back bar was set below the width plate between the above-mentioned rain top jigs, and a cooling water passage with the back bar as the -gIIJ wall was drilled in the receiving jig, so that the back bar was free from the top jig. It is possible to prevent deformation, abrasion, etc. of the banker without being subjected to pressurizing force, and improve its durability.
By increasing the cooling efficiency of the back bar, welding conditions can be kept constant, and welding quality can be improved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view with a main part broken away of the entire welding apparatus according to the present invention, FIG. 2 is a cross-sectional view taken along the line 2-2 in FIG. 1, and FIG. 4 is a partially cutaway view of the same device, and FIG. 5 is a diagram similar to FIG. 3 of the conventional example. In the drawing, 3 is a receiving jig, 4 is an upper jig, and 10 is a back bar.
111, 12 are cooling water passages, Ila, 12a are small grooves, 1
3.14 is a seal groove, 15.16 is a seal member, 19 is a welding torch, and W is a workpiece. Patent Applicant Honda Motor Co., Ltd. Agent Patent Attorney 2 1) Yobetsu Patent Attorney Kunihiko Ohashi Patent Attorney Yu Koyama

Claims (1)

[Claims] The upper jig is divided into left and right parts along the weld line between the receiver jig and the workpiece, with the workpiece placed on a receiver jig with a back bar made of metal with high thermal conductivity embedded inside. In the welding device for thin plate members, the width of the back bar is set below the width plate between the rain cover jigs, and the back bar is placed entirely within the receiving jig. A welding device for thin plate members, characterized in that a cooling water passage is bored as a side wall.